1. Consulting Civil Engineer, GeoEngineering and Environment, 12 Baskin Rd., Lexington, MA 02421 (corresponding author).
2. Consulting Geotechnical Engineer, 32550 Clay Gully Rd., Myakka City, FL 34251-9457.
3. President and CEO, Geocomp Corporation, 1145 Massachusetts Ave., Boxborough, MA 01719.